Foxboro P0916CA Pneumatic Valve Positioner

Technical Specifications:

• Input Signal: 4-20 mA DC
• Output Signal: 3-15 psi (0.2-1.0 bar)
• Supply Pressure: 20 psi (1.4 bar) nominal, range 14-40 psi (1.0-2.8 bar)
• Actuator Type: Double-acting
• Housing Material: Cast aluminum alloy (A380 or equivalent)
• Ambient Temperature: -40°F to 185°F (-40°C to 85°C)
• Enclosure Rating: IP66 / NEMA 4X
• Response Time: ≤ 1 second
• Accuracy: ±1% of span
• Surface Coating: Epoxy powder coat or anodized finish

Functional Features:

• Cast aluminum housing provides superior corrosion resistance vs. die-cast
• Enhanced mechanical strength for high-vibration applications
• Standard force-balance operation with 4-20 mA input
• Zero and span adjustments from front panel
• Fail-safe action configurable (air-to-open / air-to-close)

Performance Parameters:

• Deadband: Less than 0.5% of travel
• Hysteresis: Less than 0.5% of span
• Linearity: ±1% of span
• Supply Effect: Less than 0.25% per 1 psi supply change
• Vibration Resistance: Up to 2g RMS (10-200 Hz)

Structural Features:

• Cast aluminum body with integral mounting flange
• Reinforced wall sections at stress concentration points
• Stainless steel internal hardware (screws, springs, linkages)
• Epoxy-coated exterior for chemical resistance
• Sealed terminal compartment with gasketed cover

Working Principle:
The P0916CA operates on the force-balance principle. The 4-20 mA input signal drives an electromagnetic force motor. The resulting force is balanced against the mechanical feedback from the valve stem. The flapper-nozzle system detects any imbalance and the pneumatic relay amplifies the correction signal to the actuator. The cast aluminum housing provides a rigid, vibration-damped structure that maintains calibration stability under mechanical stress.

Advantages:

• Superior corrosion resistance for chemical and marine environments
• Higher mechanical strength than die-cast variants
• Better vibration tolerance for reciprocating compressor and pump applications
• Longer service life in aggressive atmospheres
• Same accuracy and response as standard P0916AE

Applicable Industries:

• Chemical Processing (corrosive atmospheres)
• Offshore Platforms (salt spray environments)
• Pulp and Paper (chemical recovery)
• Mining (dusty, corrosive conditions)
• Marine and Shipboard

Installation Requirements:

• Mount on actuator using standard P0916 mounting hardware
• Ensure grounding connection for static dissipation
• Use stainless steel fasteners in corrosive atmospheres
• Apply anti-seize compound on all threaded connections